US9682295B1 - Multiple-material golf club head with scarf joint - Google Patents
Multiple-material golf club head with scarf joint Download PDFInfo
- Publication number
- US9682295B1 US9682295B1 US15/062,698 US201615062698A US9682295B1 US 9682295 B1 US9682295 B1 US 9682295B1 US 201615062698 A US201615062698 A US 201615062698A US 9682295 B1 US9682295 B1 US 9682295B1
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- Prior art keywords
- golf club
- club head
- inch
- region
- thickness
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0466—Heads wood-type
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
-
- A63B2053/0408—
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
Definitions
- the present invention relates to a multiple material golf club head with an improved attachment region between parts of the head. More specifically, the present invention relates to a golf club head with a composite crown having a scarf joint attachment configuration with a face component of the head.
- This “step”-type prior art structure though relatively straightforward to manufacture, is problematic because it creates a high-stress area at the front of the bond joint, which means that a great deal of stress is placed on the adhesive when the golf club head impacts a golf ball. This causes the crown to separate from the body at the bond region, which becomes visible to a golfer after repeated use and often leads to permanent damage to the club.
- the prior art discloses other types of bond region structures, including a basic scarf joint shown in FIG. 3 (disclosed in U.S. Patent Application Publication Number 2015/0045134), but this structure is not optimized to address the significant stresses placed on the bond region and other parts of the golf club head when the head repeatedly impacts golf balls.
- One aspect of the present invention is a golf club head comprising a body having a flange and a composite crown having a tapered, full or partial scarf joint attachment region.
- a golf club head comprising a hollow body comprising a hosel, a striking face, a face extension, a bond flange extending away from the face extension, a sole, a rear flange extending away from the sole at an angle less than 90°, and an upper opening, and a composite crown, wherein the composite crown is affixed to the body with an adhesive to close the upper opening, wherein the bond flange comprises a front region and a back region, wherein the crown comprises a scarf region with a first average thickness, a transition region with a second average thickness, and a rear region with a first constant thickness, wherein the scarf region comprises a tapered edge, wherein the second average thickness is greater than the first average thickness, and wherein the second average thickness is greater than the first constant thickness.
- the front region may not comprise any convex or concave curvature.
- the bond flange may have a maximum width of no less than 0.100 inch and no more than 0.400 inch, and more preferably a maximum width of approximately 0.300 inch.
- the bond flange may have a variable width, while in others the bond flange may have a constant width.
- the back region may have a second constant thickness, which may be greater than the first constant thickness.
- the difference in thickness between the second constant thickness and the first constant thickness may be at least 0.010 inch, and more preferably may be approximately 0.015 inch.
- the transition region may have a width of at least 0.400 inch, and more preferably at least 0.500 inch.
- the first constant thickness may be no less than 0.020 inch and no more than 0.040 inch, more preferably no less than 0.022 inch and no more than 0.035 inch, and even more preferably approximately 0.022 inch.
- the crown may be composed of a compression-molded composite material, and in others, the rear flange may comprise a convex curvature.
- Yet another aspect of the present invention is a driver-type golf club head comprising a hollow metal body comprising a hosel, a striking face, a face extension, a bond flange extending away from the face extension, a sole, a rear flange extending away from an edge of the sole at an angle less than 90°, and an upper opening, and a composite crown, wherein the crown is affixed to the body with an adhesive to close the upper opening, wherein the crown comprises a scarf region with a first average thickness, a transition region with a second average thickness, and a rear region with a first constant thickness, wherein the second average thickness is greater than the first average thickness, wherein the second average thickness is greater than the first constant thickness, wherein the first constant thickness is no less than 0.020 inch and no more than 0.040 inch, wherein the scarf region comprises a tapered edge, wherein the scarf region increases in thickness from the tapered edge to the transition region, wherein the transition region comprises a maximum thickness area proximate the scarf region, and
- the crown may be compression molded from SMC material.
- the bond flange may comprise a region having a second constant thickness, which may be at least 0.015 inch greater than the first constant thickness.
- the crown may cover the entirety of the rear flange, and in others, the adhesive may have a thickness of no more than 0.010 inch.
- FIG. 1 is a cross-sectional view of a prior art golf club head.
- FIG. 2 is an exploded and partial cross-sectional view of a prior art golf club head.
- FIG. 3 is a cross-sectional view of a prior art golf club head.
- FIG. 4 is a top elevational view of a golf club head according to the present invention.
- FIG. 5 is a top elevational view of the golf club head shown in FIG. 4 with a forward-most region of the bond flange highlighted.
- FIG. 6 is a top elevational view of the golf club head shown in FIG. 4 with the rear edge of the bond flange highlighted.
- FIG. 7 is a top elevational view of the golf club head shown in FIG. 4 with the transition surface of the crown highlighted.
- FIG. 8 is a top elevational view of the golf club head shown in FIG. 4 with the constant thickness section of the crown highlighted.
- FIG. 9 is a rear perspective view of the golf club head shown in FIG. 4 with the intersection area between the crown and the rear edge of the golf club body highlighted.
- FIG. 10 is a cross-sectional view of the golf club head shown in FIG. 4 along lines 10 - 10 .
- FIG. 11 is a cross-sectional view of the golf club head shown in FIG. 9 along lines 11 - 11 .
- FIG. 12 is an enlarged view of the circled, cross-sectional area in FIG. 10 .
- FIG. 13 is a top perspective view of a traditional golf club head without its crown portion and with stress patterns illustrated across the lap joint surface.
- FIG. 14 is a top perspective view of the golf club head shown in FIG. 4 without its crown portion and with stress patterns illustrated across the bond flange surface.
- the present invention introduces a solution to the problems set forth above by providing a crown with an improved scarf joint construction and thickness distribution in combination with a golf club head having improved support flanges.
- the golf club head 10 comprises a body 20 having a striking face 22 , a heel 23 , a sole 24 , a toe 25 , a hosel 26 , a rear side 27 , a face extension 28 extending rearwards away from the striking face 22 , a bond flange 40 extending rearwards away from the face extension 28 , an upper opening, and a rear flange 50 extending away from the rear side 27 of the sole 24 towards the striking face 22 at an angle ⁇ that is preferably less than 90°.
- the golf club head 10 also comprises a crown 30 that is permanently bonded to the body 20 with an adhesive to close the upper opening and preferably is composed of a material such as triax composite, SMC, prepreg plies, or any of the compositions disclosed in U.S. Pat. No. 9,033,822, the disclosure of which is incorporated by reference in its entirety herein.
- the adhesive 15 should have a thickness of no more than 0.010 inch.
- the bond flange 40 extends away from the face extension 28 , which preferably has a front-to-back width W 1 of at least 0.200 inch, and more preferably approximately 0.400 inch.
- the bond flange 40 extends off of the face extension 28 and jogs around the hosel 26 at the heel side 23 to connect with the rear flange 50 , which extends off of the sole 24 and frames at least a portion of the upper opening.
- the bond flange 40 may have a variable front-to-back width, but preferably has a constant width W 2 that ranges from 0.100 to 0.400 inch, and more preferably is approximately 0.300 inch.
- the bond flange 40 has no convex or concave curvature to avoid introducing weak points into the bond between the bond flange 40 and the crown 30 when the golf club head 10 is fully assembled.
- the bond flange 40 has a front region 42 and a back region 44 .
- the front region 42 may vary in thickness, but the back region 44 preferably has a constant thickness T 1 to provide consistent support to the crown 30 where it contacts the body 20 .
- the crown 30 includes a tapered scarf region 32 , which includes a sharp edge 31 where the crown 30 ends, a transition region 34 where the crown thickness increases and then decreases after achieving a maximum thickness at a midpoint 35 of the transition region 34 , and a rear region 36 with a constant thickness.
- the transition region 34 preferably has a front-to-back width W 3 of at least 0.400 inch, and more preferably at least 0.500, to provide the structural support necessary to distribute stresses evenly without adding too much mass to the crown 30 .
- the rear region 36 constitutes the remaining area of the crown 30 , and preferably a majority of the area of the crown 30 .
- the edge 38 of the rear region 36 intersects with the rear flange 50 of the body 20 , which may have a convex curvature to match the curvature of the crown 30 .
- the scarf region 32 has an average thickness T 2 , defined as the average thickness of points taken along the entire front-to-back width W 2 of the scarf region 32 (which is the same as the front-to-back width of the bond flange 40 , because the scarf region 32 completely covers the bond flange 40 ), the rear region 36 has a constant thickness T 3 , and the transition region 34 has an average thickness T 4 that is greater than both T 2 and T 3 .
- the thickness T 3 of the rear region 36 is between 0.020 and 0.040 inch thick, and can be as thin as 0.022 inch if triax material is used to make the crown 30 . If SMC is used to make the crown 30 , then the rear region 36 should be at least 0.035 inch thick. In either case, the thickness T 1 of the back region 44 of the bond flange 40 should be at least 0.015 inch thicker than T 3 to provide adequate support for the crown 30 and to distribute stresses appropriately.
- the novel intersection of the bond flange 40 with the crown 30 of the present invention dramatically reduces the stress placed on the intersection between the body 20 and the crown 30 .
- the scarf joint configuration of the present invention reduces average stress on the bond flange 40 by more than 5000 psi.
- the golf club head 10 of the present invention may be constructed to take various shapes, including traditional, square, rectangular, or triangular.
- the golf club head 10 of the present invention may take shapes such as those disclosed in U.S. Pat. Nos. 7,163,468, 7,166,038, 7,169,060, 7,278,927, 7,291,075, 7,306,527, 7,311,613, 7,390,269, 7,407,448, 7,410,428, 7,413,520, 7,413,519, 7,419,440, 7,455,598, 7,476,161, 7,494,424, 7,578,751, 7,588,501, 7,591,737, and 7,749,096, the disclosure of each of which is incorporated by reference in its entirety herein.
- the golf club head 10 of the present invention may also have variable striking face 22 thickness, such as the thickness patterns disclosed in U.S. Pat. Nos. 5,163,682, 5,318,300, 5,474,296, 5,830,084, 5,971,868, 6,007,432, 6,338,683, 6,354,962, 6,368,234, 6,398,666, 6,413,169, 6,428,426, 6,435,977, 6,623,377, 6,997,821, 7,014,570, 7,101,289, 7,137,907, 7,144,334, 7,258,626, 7,422,528, 7,448,960, 7,713,140, 8,012,041, 8,696,489, and 9,101,809, the disclosure of each of which is incorporated by reference in its entirety herein.
- the mass of the club head 10 of the present invention ranges from 165 grams to 250 grams, preferably ranges from 175 grams to 230 grams, and most preferably from 190 grams to 205 grams.
- the crown 30 has a mass preferably ranging from 4 grams to 30 grams, more preferably from 15 grams to 25 grams, and most preferably 20 grams.
- the golf club head 10 of the present invention preferably has a volume that ranges from 290 cubic centimeters to 600 cubic centimeters, and more preferably ranges from 330 cubic centimeters to 510 cubic centimeters, even more preferably 350 cubic centimeters to 495 cubic centimeters, and most preferably 415 cubic centimeters or 470 cubic centimeters.
- the center of gravity and the moment of inertia of a golf club head 10 of the present invention are preferably measured using a test frame (X T , Y T , Z T ), and then transformed to a head frame (X H , Y H , Z H ).
- the center of gravity of a golf club head may be obtained using a center of gravity table having two weight scales thereon, as disclosed in U.S. Pat. No. 6,607,452, entitled High Moment Of Inertia Composite Golf Club, and hereby incorporated by reference in its entirety.
- the moment of inertia, Izz, about the Z axis for the golf club head 10 of the present invention preferably ranges from 2800 g-cm 2 to 6000 g-cm 2 , preferably from 3000 g-cm 2 to 600 g-cm 2 , and most preferably from 5000 g-cm 2 to 6000 g-cm 2 .
- the moment of inertia, Iyy, about the Y axis for the golf club head 10 preferably ranges from 1500 g-cm 2 to 5000 g-cm 2 , preferably from 2000 g-cm 2 to 5000 g-cm 2 , and most preferably from 3000 g-cm 2 to 4500 g-cm 2 .
- the moment of inertia, Ixx, about the X axis for the golf club head 10 preferably ranges from 1500 g-cm 2 to 4000 g-cm 2 , preferably from 2000 g-cm 2 to 3500 g-cm 2 , and most preferably from 2500 g-cm 2 to 3000 g-cm 2 .
- the golf club heads 10 of the present invention preferably have coefficient of restitutions (“COR”) ranging from 0.81 to 0.875, and more preferably from 0.82 to 0.84.
- COR coefficient of restitutions
- the golf club heads 10 preferably have characteristic times (“CT”) as measured under USGA conditions of 256 microseconds.
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Abstract
Description
Claims (20)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US15/062,698 US9682295B1 (en) | 2016-01-18 | 2016-03-07 | Multiple-material golf club head with scarf joint |
US15/613,764 US10279224B1 (en) | 2016-01-18 | 2017-06-05 | Multiple material golf club head with crown scarf joint |
US16/401,829 US10702749B2 (en) | 2016-01-18 | 2019-05-02 | Multiple material golf club head with crown scarf joint |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662280077P | 2016-01-18 | 2016-01-18 | |
US15/062,698 US9682295B1 (en) | 2016-01-18 | 2016-03-07 | Multiple-material golf club head with scarf joint |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/613,764 Continuation-In-Part US10279224B1 (en) | 2016-01-18 | 2017-06-05 | Multiple material golf club head with crown scarf joint |
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US9682295B1 true US9682295B1 (en) | 2017-06-20 |
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Application Number | Title | Priority Date | Filing Date |
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US15/062,698 Active US9682295B1 (en) | 2016-01-18 | 2016-03-07 | Multiple-material golf club head with scarf joint |
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US (1) | US9682295B1 (en) |
Cited By (26)
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WO2018156205A1 (en) * | 2017-02-23 | 2018-08-30 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US10376754B2 (en) | 2014-08-26 | 2019-08-13 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US10695624B2 (en) | 2014-08-26 | 2020-06-30 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US10722765B2 (en) | 2014-08-26 | 2020-07-28 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US10960274B2 (en) | 2014-08-26 | 2021-03-30 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US10967231B2 (en) | 2014-08-26 | 2021-04-06 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11103755B2 (en) | 2014-08-26 | 2021-08-31 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11110328B2 (en) | 2014-08-26 | 2021-09-07 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11117028B2 (en) | 2014-08-26 | 2021-09-14 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11173356B2 (en) | 2014-08-26 | 2021-11-16 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11266888B2 (en) | 2017-01-10 | 2022-03-08 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11484756B2 (en) | 2017-01-10 | 2022-11-01 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11618079B1 (en) | 2020-04-17 | 2023-04-04 | Cobra Golf Incorporated | Systems and methods for additive manufacturing of a golf club |
US11618213B1 (en) | 2020-04-17 | 2023-04-04 | Cobra Golf Incorporated | Systems and methods for additive manufacturing of a golf club |
US11617925B2 (en) | 2019-03-11 | 2023-04-04 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11654338B2 (en) | 2017-01-10 | 2023-05-23 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11654337B2 (en) | 2014-08-26 | 2023-05-23 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11684831B2 (en) | 2017-01-10 | 2023-06-27 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11707651B2 (en) | 2017-01-10 | 2023-07-25 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture gulf club heads |
US11779819B2 (en) | 2014-08-26 | 2023-10-10 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11806585B2 (en) | 2014-08-26 | 2023-11-07 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11806589B2 (en) | 2019-03-11 | 2023-11-07 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
US11839798B2 (en) | 2019-03-11 | 2023-12-12 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
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US12064670B2 (en) | 2017-01-10 | 2024-08-20 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
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